Ordinary does not mean ordinary, ordinary does not mean excessive, and indifference does not mean cold-hearted.
One is a "five good" boy who just wants to have an ordinary life, be an ordinary person, draw his own lines of defense, and post those funny but true words: I allow you to enter my world, and I also allow you to walk around in my world, but you will never be allowed to walk in or out of my world.
One is a "ruffian" agent who only wants to live a life of chaos and hide his bloodthirsty nature. However, the "collision" between the two changed each other's life.